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Theodolite Manual: Hilger Watts

  • Example readings with annotated diagrams
  • Eccentricity correction notes (if user-adjustable)
  • Circle setting – using upper/lower motion clamps and tangents

    • Periodic checks (every 3-6 months):

    | Error | Test | Correction | | :--- | :--- | :--- | | Plate level error | Bubble not centered after 180° rotation. | Adjust bubble vial using adjustment screws. | | Collimation error (Horizontal) | Line of sight not perpendicular to horizontal axis. | Sight far point in Face I & Face II; difference >2x error → adjust reticle screws. | | Horizontal axis tilt | Vertical crosshair leans when telescope is tilted. | Requires workshop adjustment (shims). | | Vertical index error | Face I & Face II vertical readings do not sum to 360°. | Adjust vertical circle index via micrometer knob screw (detailed in manual). | hilger watts theodolite manual

    This feature transforms a static PDF or printed manual into a hands-on restoration and maintenance tool, addressing the specific needs of surveyors and collectors dealing with aging equipment. Periodic checks (every 3-6 months): | Error |

    You might ask: "Isn’t using a theodolite universal? Point, read, record." This is dangerously incorrect for Hilger Watts instruments. Here is why the original Hilger Watts theodolite manual is indispensable: hilger watts theodolite manual